/*
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* Copyright (c) 2017 Linux Test Project
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms in version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*/
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#ifdef __linux__
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# include <errno.h>
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# include <string.h>
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int tst_process_state_wait3(pid_t pid, const char state,
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unsigned long maxwait_ms)
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{
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char proc_path[128], cur_state;
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int wait_step_ms = 10;
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unsigned long waited_ms = 0;
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snprintf(proc_path, sizeof(proc_path), "/proc/%i/stat", pid);
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for (;;) {
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FILE *f = fopen(proc_path, "r");
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if (!f) {
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fprintf(stderr, "Failed to open '%s': %s\n",
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proc_path, strerror(errno));
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return 1;
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}
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if (fscanf(f, "%*i %*s %c", &cur_state) != 1) {
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fclose(f);
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fprintf(stderr, "Failed to read '%s': %s\n",
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proc_path, strerror(errno));
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return 1;
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}
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fclose(f);
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if (state == cur_state)
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return 0;
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usleep(wait_step_ms * 1000);
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waited_ms += wait_step_ms;
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if (waited_ms >= maxwait_ms) {
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fprintf(stderr, "Reached max wait time\n");
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return 1;
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}
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}
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}
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#else
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int tst_process_state_wait3(pid_t pid, const char state,
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unsigned long maxwait_ms)
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{
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usleep(maxwait_ms * 1000);
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return 0;
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}
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#endif
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